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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2011
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
5. PROPERTY, PLANT AND EQUIPMENT

 

Property, plant and equipment consisted of the following (in millions):

 

                 
As of December 31,   2011     2010  

Land

  $ 22.3     $ 22.0  

Building and equipment

    1,196.8       1,162.0  

Capitalized software costs

    208.4       172.0  

Instruments

    1,509.2       1,365.6  

Construction in progress

    76.4       66.5  

 

   

 

 

 
      3,013.1       2,788.1  

Accumulated depreciation

    (1,805.8     (1,574.3

 

   

 

 

 

Property, plant and equipment, net

  $ 1,207.3     $ 1,213.8  

 

   

 

 

 

Depreciation expense was $266.1 million, $247.9 million and $244.2 million for the years ended December 31, 2011, 2010 and 2009, respectively.